<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .header, .footer {
            width: 100%;
            background: #ccc;
        }
    </style>
</head>
<body>
    <div id="app">
        <div class="header">title</div>
        <div class="container">
            <div class="left column">left</div>
            <div class="center column">center</div>
            <div class="right column">right</div>
        </div>
        <div class="footer">footer</div>
    </div>
</body>
</html>